/*
 * Copyright (C) 2012 CyberAgent
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.jarlen.photoedit.filter.base;

public enum Rotation
{
	NORMAL, ROTATION_90, ROTATION_180, ROTATION_270;

	/**
	 * Retrieves the int representation of the Rotation.
	 * 
	 * @return 0, 90, 180 or 270
	 */
	public int asInt()
	{
		switch (this)
		{
			case NORMAL :
				return 0;
			case ROTATION_90 :
				return 90;
			case ROTATION_180 :
				return 180;
			case ROTATION_270 :
				return 270;
			default :
				throw new IllegalStateException("Unknown Rotation!");
		}
	}

	/**
	 * Create a Rotation from an integer. Needs to be either 0, 90, 180 or 270.
	 * 
	 * @param rotation
	 *            0, 90, 180 or 270
	 * @return Rotation object
	 */
	public static Rotation fromInt(int rotation)
	{
		switch (rotation)
		{
			case 0 :
				return NORMAL;
			case 90 :
				return ROTATION_90;
			case 180 :
				return ROTATION_180;
			case 270 :
				return ROTATION_270;
			case 360 :
				return NORMAL;
			default :
				throw new IllegalStateException(
						rotation
								+ " is an unknown rotation. Needs to be either 0, 90, 180 or 270!");
		}
	}
}
